Steam-superheater.



E. H. FOSTER. s'rmm SUPEBHEYATEB.

APPLIDATIOH FILED 811F129, 1905. Patented 23,

2 SEEMS-SHEET 1.

IMVEN TOR E-Hlbsfer y Q W moaxmi E. H. FOSTER.

STEAM SUPBRHBATER.

APPLIUA'NQN FILED 821F129. 1905.

Patented Feb. 23, 909.

2 SHEBTS-SHEET 2 INVENTOR WITNESSES:

LiliFasfer BY Wig Qfz m Armani .5

to other generating ERNEST H. FOSTER, OF NEW YORK, N. ,Y.

s'rE ism-surname ATER.

\ Application filed September 29, 1905.

Specification of Letters Patent.

Patented Feb. 23, 1909.

Serial No. $30,684.

T 0 all whom it may concern:

Be it known that I, Ennnsr a citizen of the United States, residing in i of Richmond and New York, in the county State of New York, have invented certain new and useful lmprovements in Steam- Superheaters, of which the following is a specification, reference being bad to the drawing accompanying and forming part of the same.

My invention relates to the superheating of steam, more particularly in connection with a boiler of the so-called return tubular type, but embraces features applicable plants as well.

ln carrying out my invention I provide a supcrheater composed of two sets of vertical pipes, the sets being spaced a short distance apart, located in the rear combustion chain her of the generating apparatus. At the top the two sets are connected by an inlet pipe, at the center of which the steam from the boiler is admitted, so as to divide and flow laterally to the two sets or groups of superheating pipes. The delivery ipe,from which the superheated steam is de livered to the service pipe, also connects the groups of tubes at thetop, and is connected with the service pipe at the center, The course of "the steam from the holler to the service main therefore divides in the super-heater supply pipes, asses through the parallel groups of vertica tubes and then unites again in the delivery pipe.

The supcrheater is, as before stated, located in the rear combustion chamber of the boiler. One group or set of ipcs is located at one side of the said cham er and the other set at the other side. The space between the two groups provides an opening through which the gases of combustion have practically free passage to the fines above. From the sides of the boiler casing Wit 3.! walls extend over the superheater tubcs in the path of the furnace gases, and protect the former from the effects o! the direct impingement of the latter. At the same time the narrowing of the passage by the wing Walls causes a coni H. FOSTER, haccessi destructive rcmration an-i coininingling of the hotter and cooler gases at that point, with considerablc acceleration walls also serve to dcllcct soot and as toward the center, where such as is not hulrn it in" the blow-pipiof speed. The wipglg "Il OCt at this point and loft, thus passing or swe t out by the strong draft is readily )le for removal.

For more detailed explanation reference may now be had to the accompanying drawirigs, in which is shown the preferred embodiment of the invention.

Therein, Fi ure {1 is a longitudinal section on line 'Y, Fig. 2, showing the boiler inside 'elevation. Fig. 2 is a horizontal section on line Z-Z, Fig. 1. Fig. 3 is a transverse section on line X-X, Fig. 4, and Fig. 4 is a top plan View of the rear end of the boiler and setting, showing the superheater in position. 7

As before stated, my invention is desiglped more particularly for a return tu ular-boiler, that is, one in which the flames and gases pass under the boiler to the rear, then up to the flues, through the latter to the smoke chamber and stack at the front of the boiler. Such an arran ement is shown in the drawings, the boi er itself being designated by B, and its rear end by F. At this end is the rear combustion chamber, extending transversely across the boiler. Located in the chamber is the superheater A, consisting of two groups, K, of vertical pi es, one group or section located at one sir e of the chamber and the other group or side, with an open space between them, as previously explained. From this open space the superheater pipes or elements and adjacent parts of the boiler and setting are readily accessible for inspection and repair.

In'thc present embodiment of the invention there are four pipesin each group. The

' forward pair of each group is connected to a suitable transverse header, as G, secured by flange joints I to the inlet pipe I, at the center of which the supply pipe C is connected by a flange joint H. The latter pipe connects with. th boiler, to receive steam therefrom. At the bottom each pipe of the forward pairs is connected to its neighbor in the rear pair by a longitudinal header, as G. The rear pairs are connected to transverse headers like those of the forward airs, secured by Ilangc joints, 0 to the out st or delivery pipe 0, which may be connected by a (lange D at its center to the service main.

Flowing from the supply pi )e (l, the steam (inters the inlet pipe 1 ant divides to right to the forward pairs of section at the otherthe sets of tubes. At the latter each stream divides, half passing through one tube and half through the other, down to the bottom headers and up the rear tubes to the top headers in which the four streams unite in two, r hich latter unite in the outlet pipe 0 and finally enter the service pipe together.

In front of the two groups of tubes, below the boiler, are the wing '{L ls or piers W \Y. These serve both to support the rear end of the boiler and also to protect the super-heater tubes from the direct in'lpingemeut of the l furnace gases. The supcrheater groups or sets are provided with )ottom plates '1, T, which are supported by low walls 3, 8, ex-

tending rerrwardly from the wings or piers 1 Vi", \"\",.forn1ing pockets closed to the coinbustion chamber but readily accessible by means of doors, not shown, which may be located at M, M, Fig. 2. The furnace gases, passing to the rear under the boiler, strike the wings W, W, and are directed to the central passage E, from which part of the stream of gases is diffused among the superheater Gl8ln6I1tS,'fl.lth0Ugl1 the main body of the stream flows unintcrruptedly between the two sections or groups.

For the purpose of cleaning the pipes the openings V are provided in the top of the setting. Through these apertures jets of steam may be in cctQd, to blow off accumulations of soot.

It is to be understood that the mere details of construction herein specifically shown are immaterial, and that the invention may be embodied in a variety of different forms without departure from its proper sco e.

\Vhat 1 claim is:

1. The combination with a boiler and a structure inclosing the same, said structure including parallel walls, of a vertical Wall or partition extending from one of said walls and terminating short of the other of said walls to provide a chamber in said structure in rear of the boiler, and a flue space, and a superheater located in said chamber behind 'f said partition or wall and to one side and j away from the flue space so as to be out of l the direct path of the furnace gases but to i be subjected to the heat thereof,

2. The con'lbination with a boiler and a structure inclosing the same, of a chandler formed in said structure in rear of the boiler, said chamber being separated from the boiler by partitions or wings spaced apart t from each other to permit passage of the furnace gases, and a pair of superhcaters arranger! in said chamber, said supcrhcaters t being located one behind card] of said par- 3 titions whereby said superheatcrs are pro- 3 tected from the furnace gases, said superheaters being separated by a space alining with the one between the wings to provide for the free passage of the gases, and means to feed steam from the boiler to said super heaters.

3. The combination with a tubular boiler, of a combustion chamber at the rear end thereof, a superheater in, the chamber, composed of two sections one located at each side of the chamber, and Wing walls extending inwardly from the boiler setting in front of the superheater sections to protect the latter from the direct impingement of the furnace gases, as set forth.

4. The combination with a boiler and a structure inclosing the same, of a chamber formed in. said structure in rear of the boiler, said chamber being separated from the boiler by partitions or wings spaced apart from each other to permit passage of the furnace gases, and a pair of 'superheatcrs arranged in said chamber, said so erheaters being located one behind each 0 said partitions or win s whereby said superheaters are protected rope the direct action of the furnace gases, and means to feed steam to the superhcatersf ERNEST ll. FOSTER. 

